Marketing site (bargevasat.ir) + admin-editable store links + subdomain split

- New standalone Next.js marketing site under site/ (static export, SEO):
  landing, download/install guide (Bazaar/Myket/iOS-PWA/web), FAQ (JSON-LD),
  privacy, terms, support, /admin link editor. fa RTL, sitemap/robots/manifest.
- Backend: SiteLinksService (JSON-file persisted) + GET /api/site/links (public)
  + POST /api/admin/site/links (X-Admin-Token). ADMIN_TOKEN + Site__DataDir via env.
- compose: hokm-site service (:1520) + hokm_data volume for links JSON.
- CI deploy job builds + deploys the site container.
- deploy/SUBDOMAIN_SPLIT.md: nginx blocks, cert reissue, DNS, ENV split.
- Exclude site/ from root tsc + web docker context.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

site/app/manifest.ts

@@ -0,0 +1,20 @@
+import type { MetadataRoute } from "next";
+
+export const dynamic = "force-static";
+
+export default function manifest(): MetadataRoute.Manifest {
+  return {
+    name: "برگ وسط — بازی حکم آنلاین",
+    short_name: "برگ وسط",
+    description: "بازی حکم ایرانی آنلاین با دوستان و هوش مصنوعی.",
+    start_url: "/",
+    display: "standalone",
+    background_color: "#070b18",
+    theme_color: "#070b18",
+    dir: "rtl",
+    lang: "fa",
+    icons: [
+      { src: "/icon.svg", sizes: "any", type: "image/svg+xml", purpose: "any" },
+    ],
+  };
+}